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Re: a probalem with Bison

From: Paul Eggert
Subject: Re: a probalem with Bison
Date: Mon, 06 Jun 2005 09:38:33 -0700
User-agent: Gnus/5.1006 (Gnus v5.10.6) Emacs/21.4 (gnu/linux)

josephus <address@hidden> writes:

> bison -v -d nualgol.y does not generate nualgol.table and does not
> generate nualgol.tab.h

Unfortunately you haven't sent us a file named nualgol.y, so it won't
be easy for us to reproduce the problem.

> I found the m4 files in the bison source direct y, but there is no
> m4sugar.m4 there is no sugar anything.

This sounds like Bison wasn't installed correctly in your machine.
For example, if you installed Bison 2.0a by running the commands
"configure; make; make install" then you should be running the command
"/usr/local/bin/bison" and you should observe something like the
following behavior when you are running the shell:

   $ type bison
   bison is /usr/local/bin/bison
   $ find /usr/local/share/bison -name '*m4sugar*' -print

If you get different behavior, then your Bison wasn't installed
correctly, and that is what you need to be looking at.

> make install ... would mangle
> my file system. not only would it maxed out the portion, it would
> overwrite datafiles.

Please install into some other area, then.  For example:

   $ configure --prefix=/my/location
   $ make
   $ make install

This will install into /my/location/bin/bison, etc., rather than
/usr/local/bin/bison.  You can then repair things later by removing

> I start with  algol.y and algol.l
> bison -v -d algol.y
> rename algol.tab.h algol.h
> flex algol.l
> compile and link.

I cannot reproduce the problem with the code that you submitted.  Can
you please resubmit exactly what you have now, using a gzipped tar
file as before?  Apparently you've made some changes.  Here's my
attempt to reproduce it:

   bash-2.05a$ bison -v -d algol.y
   bash-2.05a$ mv algol.tab.h algol.h
   bash-2.05a$ flex algol.l
   bash-2.05a$ make
   gcc -g -c lex.yy.c
   algol.l: In function 'yylex':
   algol.l:47: error: 'LONG' undeclared (first use in this function)
   algol.l:47: error: (Each undeclared identifier is reported only once
   algol.l:47: error: for each function it appears in.)
   algol.l:80: error: 'MOD' undeclared (first use in this function)
   algol.l: In function 'init':
   algol.l:150: error: invalid lvalue in assignment
   algol.l:153: error: invalid lvalue in assignment
   algol.l: In function 'symbol':
   algol.l:171: error: invalid lvalue in assignment
   algol.l:175: error: invalid lvalue in assignment
   algol.l:185: error: invalid lvalue in assignment
   algol.l: In function 'main':
   algol.l:220: warning: incompatible implicit declaration of built-in function 
   make: *** [lex.yy.o] Error 1

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